S-97345A799 1/2"-13 ASME B18.3 Shoulder Screws
Shoulder Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with 316 stainless steel construction, ideal for harsh chemical and marine environments
- Exceptional mechanical strength with 70,000 psi tensile and 35,000 psi shear strength for heavy-duty applications
- Precise Class 3A thread fit ensuring reliable engagement and vibration resistance in critical assemblies
- Knurled head design providing enhanced grip for manual adjustments during installation and maintenance
- Standard hex socket drive allowing efficient torque transmission with common 5/16" tools
- Accurate shoulder dimensions maintaining consistent positioning and alignment in rotating components
- Full regulatory compliance meeting ASME B18.3 specifications and environmental standards (RoHS 3/REACH)
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw delivers critical performance in demanding industrial applications where corrosion resistance and mechanical reliability are paramount. The 1/2"-13 UNC coarse thread with Class 3A fit ensures secure fastening in high-vibration environments, while the precision-machined shoulder provides exact bearing surfaces for rotating components in machinery, conveyor systems, and precision instruments. The knurled socket head facilitates quick assembly and disassembly, reducing maintenance downtime. Engineered to withstand aggressive chemicals, saltwater exposure, and extreme temperatures, these shoulder screws offer long-term reliability in food processing, chemical plants, marine equipment, and automated manufacturing systems where fastener failure is not an option.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit for superior dimensional accuracy. Features include: 1/2"-13 UNC coarse thread, 0.5" thread diameter, 3/4" thread length, 5/8" shoulder diameter (-0.004" to -0.002" tolerance), and 7/16" shoulder length (-0.005" to 0.005" tolerance). Material hardness rated at Rockwell B79 with mechanical properties of 70,000 psi tensile strength and 35,000 psi minimum shear strength. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial use.
